Document 44j5mk18xqDRdND8VY9DLLMBN

Aflbeatos Workshop in Review ATTACHMENT 1 Page 2 _og-2 Malcolm Roas. U.S. Geological Survey According to the preBent OSHA definition for asbestos, rocks from Maine to Georgia could be viewed aB containing asbestos and be considered unsuita ble for quarrying for crushed stone. Evidence is lacking on any environ mental health threat from such operations. Canadian mining studies with higher concentrations of cbrysotile asbestos indicate no adverse health effeots. The 1976 NIOSH (National Institute for Occupational Safety and Health) can be oriticized on the basis there is ho safe level of exposure to asbestos and questions the safety of the crust of the earth. Paul Gross. Medical University of S. Carolina Animal studies which have produced tumors by inhalation have not been cited. The conference concluded with presentations on the advantages and limitations of available analytical methods and counting techniques for detection and measurement of the workplace contaminants. Studies have been done using x-ray diffraction, (TEM) transmission electron microseopy, thermo-analysis, phase contrast and optical mieroseopy. Proceedings will be published and sent to all those who attended. Addtional oopies may be ordered through the National Bureau of Standards. HFM - 004232 C. B. Zelek Vehicle Materials Engineering August, 1977 1569